diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
new file mode 100644
index 0000000..92f79d5
--- /dev/null
+++ b/Lib/test/test_descr.py
@@ -0,0 +1,829 @@
+# Test descriptor-related enhancements
+
+from test_support import verify, verbose
+from copy import deepcopy
+
+def testunop(a, res, expr="len(a)", meth="__len__"):
+    if verbose: print "checking", expr
+    dict = {'a': a}
+    verify(eval(expr, dict) == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    verify(m(a) == res)
+    bm = getattr(a, meth)
+    verify(bm() == res)
+
+def testbinop(a, b, res, expr="a+b", meth="__add__"):
+    if verbose: print "checking", expr
+    dict = {'a': a, 'b': b}
+    verify(eval(expr, dict) == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    verify(m(a, b) == res)
+    bm = getattr(a, meth)
+    verify(bm(b) == res)
+
+def testternop(a, b, c, res, expr="a[b:c]", meth="__getslice__"):
+    if verbose: print "checking", expr
+    dict = {'a': a, 'b': b, 'c': c}
+    verify(eval(expr, dict) == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    verify(m(a, b, c) == res)
+    bm = getattr(a, meth)
+    verify(bm(b, c) == res)
+
+def testsetop(a, b, res, stmt="a+=b", meth="__iadd__"):
+    if verbose: print "checking", stmt
+    dict = {'a': deepcopy(a), 'b': b}
+    exec stmt in dict
+    verify(dict['a'] == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    dict['a'] = deepcopy(a)
+    m(dict['a'], b)
+    verify(dict['a'] == res)
+    dict['a'] = deepcopy(a)
+    bm = getattr(dict['a'], meth)
+    bm(b)
+    verify(dict['a'] == res)
+
+def testset2op(a, b, c, res, stmt="a[b]=c", meth="__setitem__"):
+    if verbose: print "checking", stmt
+    dict = {'a': deepcopy(a), 'b': b, 'c': c}
+    exec stmt in dict
+    verify(dict['a'] == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    dict['a'] = deepcopy(a)
+    m(dict['a'], b, c)
+    verify(dict['a'] == res)
+    dict['a'] = deepcopy(a)
+    bm = getattr(dict['a'], meth)
+    bm(b, c)
+    verify(dict['a'] == res)
+
+def testset3op(a, b, c, d, res, stmt="a[b:c]=d", meth="__setslice__"):
+    if verbose: print "checking", stmt
+    dict = {'a': deepcopy(a), 'b': b, 'c': c, 'd': d}
+    exec stmt in dict
+    verify(dict['a'] == res)
+    t = type(a)
+    m = getattr(t, meth)
+    verify(m == t.__dict__[meth])
+    dict['a'] = deepcopy(a)
+    m(dict['a'], b, c, d)
+    verify(dict['a'] == res)
+    dict['a'] = deepcopy(a)
+    bm = getattr(dict['a'], meth)
+    bm(b, c, d)
+    verify(dict['a'] == res)
+
+def lists():
+    if verbose: print "Testing list operations..."
+    testbinop([1], [2], [1,2], "a+b", "__add__")
+    testbinop([1,2,3], 2, 1, "b in a", "__contains__")
+    testbinop([1,2,3], 4, 0, "b in a", "__contains__")
+    testbinop([1,2,3], 1, 2, "a[b]", "__getitem__")
+    testternop([1,2,3], 0, 2, [1,2], "a[b:c]", "__getslice__")
+    testsetop([1], [2], [1,2], "a+=b", "__iadd__")
+    testsetop([1,2], 3, [1,2,1,2,1,2], "a*=b", "__imul__")
+    testunop([1,2,3], 3, "len(a)", "__len__")
+    testbinop([1,2], 3, [1,2,1,2,1,2], "a*b", "__mul__")
+    testbinop([1,2], 3, [1,2,1,2,1,2], "b*a", "__rmul__")
+    testset2op([1,2], 1, 3, [1,3], "a[b]=c", "__setitem__")
+    testset3op([1,2,3,4], 1, 3, [5,6], [1,5,6,4], "a[b:c]=d", "__setslice__")
+
+def dicts():
+    if verbose: print "Testing dict operations..."
+    testbinop({1:2}, {2:1}, -1, "cmp(a,b)", "__cmp__")
+    testbinop({1:2,3:4}, 1, 1, "b in a", "__contains__")
+    testbinop({1:2,3:4}, 2, 0, "b in a", "__contains__")
+    testbinop({1:2,3:4}, 1, 2, "a[b]", "__getitem__")
+    d = {1:2,3:4}
+    l1 = []
+    for i in d.keys(): l1.append(i)
+    l = []
+    for i in iter(d): l.append(i)
+    verify(l == l1)
+    l = []
+    for i in d.__iter__(): l.append(i)
+    verify(l == l1)
+    l = []
+    for i in dictionary.__iter__(d): l.append(i)
+    verify(l == l1)
+    d = {1:2, 3:4}
+    testunop(d, 2, "len(a)", "__len__")
+    verify(eval(repr(d), {}) == d)
+    verify(eval(d.__repr__(), {}) == d)
+    testset2op({1:2,3:4}, 2, 3, {1:2,2:3,3:4}, "a[b]=c", "__setitem__")
+
+binops = {
+    'add': '+',
+    'sub': '-',
+    'mul': '*',
+    'div': '/',
+    'mod': '%',
+    'divmod': 'divmod',
+    'pow': '**',
+    'lshift': '<<',
+    'rshift': '>>',
+    'and': '&',
+    'xor': '^',
+    'or': '|',
+    'cmp': 'cmp',
+    'lt': '<',
+    'le': '<=',
+    'eq': '==',
+    'ne': '!=',
+    'gt': '>',
+    'ge': '>=',
+    }
+
+for name, expr in binops.items():
+    if expr.islower():
+        expr = expr + "(a, b)"
+    else:
+        expr = 'a %s b' % expr
+    binops[name] = expr
+
+unops = {
+    'pos': '+',
+    'neg': '-',
+    'abs': 'abs',
+    'invert': '~',
+    'int': 'int',
+    'long': 'long',
+    'float': 'float',
+    'oct': 'oct',
+    'hex': 'hex',
+    }
+
+for name, expr in unops.items():
+    if expr.islower():
+        expr = expr + "(a)"
+    else:
+        expr = '%s a' % expr
+    unops[name] = expr
+
+def numops(a, b, skip=[]):
+    dict = {'a': a, 'b': b}
+    for name, expr in binops.items():
+        if name not in skip:
+            name = "__%s__" % name
+            if hasattr(a, name):
+                res = eval(expr, dict)
+                testbinop(a, b, res, expr, name)
+    for name, expr in unops.items():
+        name = "__%s__" % name
+        if hasattr(a, name):
+            res = eval(expr, dict)
+            testunop(a, res, expr, name)
+
+def ints():
+    if verbose: print "Testing int operations..."
+    numops(100, 3)
+
+def longs():
+    if verbose: print "Testing long operations..."
+    numops(100L, 3L)
+
+def floats():
+    if verbose: print "Testing float operations..."
+    numops(100.0, 3.0)
+
+def complexes():
+    if verbose: print "Testing complex operations..."
+    numops(100.0j, 3.0j, skip=['lt', 'le', 'gt', 'ge'])
+    class Number(complex):
+        __slots__ = ['prec']
+        def __init__(self, *args, **kwds):
+            self.prec = kwds.get('prec', 12)
+        def __repr__(self):
+            prec = self.prec
+            if self.imag == 0.0:
+                return "%.*g" % (prec, self.real)
+            if self.real == 0.0:
+                return "%.*gj" % (prec, self.imag)
+            return "(%.*g+%.*gj)" % (prec, self.real, prec, self.imag)
+        __str__ = __repr__
+    a = Number(3.14, prec=6)
+    verify(`a` == "3.14")
+    verify(a.prec == 6)
+
+def spamlists():
+    if verbose: print "Testing spamlist operations..."
+    import copy, xxsubtype as spam
+    def spamlist(l, memo=None):
+        import xxsubtype as spam
+        return spam.spamlist(l)
+    # This is an ugly hack:
+    copy._deepcopy_dispatch[spam.spamlist] = spamlist
+
+    testbinop(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+b", "__add__")
+    testbinop(spamlist([1,2,3]), 2, 1, "b in a", "__contains__")
+    testbinop(spamlist([1,2,3]), 4, 0, "b in a", "__contains__")
+    testbinop(spamlist([1,2,3]), 1, 2, "a[b]", "__getitem__")
+    testternop(spamlist([1,2,3]), 0, 2, spamlist([1,2]),
+               "a[b:c]", "__getslice__")
+    testsetop(spamlist([1]), spamlist([2]), spamlist([1,2]),
+              "a+=b", "__iadd__")
+    testsetop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*=b", "__imul__")
+    testunop(spamlist([1,2,3]), 3, "len(a)", "__len__")
+    testbinop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*b", "__mul__")
+    testbinop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "b*a", "__rmul__")
+    testset2op(spamlist([1,2]), 1, 3, spamlist([1,3]), "a[b]=c", "__setitem__")
+    testset3op(spamlist([1,2,3,4]), 1, 3, spamlist([5,6]),
+               spamlist([1,5,6,4]), "a[b:c]=d", "__setslice__")
+    # Test subclassing
+    class C(spam.spamlist):
+        def foo(self): return 1
+    a = C()
+    verify(a == [])
+    verify(a.foo() == 1)
+    a.append(100)
+    verify(a == [100])
+    verify(a.getstate() == 0)
+    a.setstate(42)
+    verify(a.getstate() == 42)
+
+def spamdicts():
+    if verbose: print "Testing spamdict operations..."
+    import copy, xxsubtype as spam
+    def spamdict(d, memo=None):
+        import xxsubtype as spam
+        sd = spam.spamdict()
+        for k, v in d.items(): sd[k] = v
+        return sd
+    # This is an ugly hack:
+    copy._deepcopy_dispatch[spam.spamdict] = spamdict
+
+    testbinop(spamdict({1:2}), spamdict({2:1}), -1, "cmp(a,b)", "__cmp__")
+    testbinop(spamdict({1:2,3:4}), 1, 1, "b in a", "__contains__")
+    testbinop(spamdict({1:2,3:4}), 2, 0, "b in a", "__contains__")
+    testbinop(spamdict({1:2,3:4}), 1, 2, "a[b]", "__getitem__")
+    d = spamdict({1:2,3:4})
+    l1 = []
+    for i in d.keys(): l1.append(i)
+    l = []
+    for i in iter(d): l.append(i)
+    verify(l == l1)
+    l = []
+    for i in d.__iter__(): l.append(i)
+    verify(l == l1)
+    l = []
+    for i in type(spamdict({})).__iter__(d): l.append(i)
+    verify(l == l1)
+    straightd = {1:2, 3:4}
+    spamd = spamdict(straightd)
+    testunop(spamd, 2, "len(a)", "__len__")
+    testunop(spamd, repr(straightd), "repr(a)", "__repr__")
+    testset2op(spamdict({1:2,3:4}), 2, 3, spamdict({1:2,2:3,3:4}),
+               "a[b]=c", "__setitem__")
+    # Test subclassing
+    class C(spam.spamdict):
+        def foo(self): return 1
+    a = C()
+    verify(a.items() == [])
+    verify(a.foo() == 1)
+    a['foo'] = 'bar'
+    verify(a.items() == [('foo', 'bar')])
+    verify(a.getstate() == 0)
+    a.setstate(100)
+    verify(a.getstate() == 100)
+
+def pydicts():
+    if verbose: print "Testing Python subclass of dict..."
+    verify(issubclass(dictionary, dictionary))
+    verify(isinstance({}, dictionary))
+    d = dictionary()
+    verify(d == {})
+    verify(d.__class__ is dictionary)
+    verify(isinstance(d, dictionary))
+    class C(dictionary):
+        state = -1
+        def __init__(self, *a, **kw):
+            if a:
+                assert len(a) == 1
+                self.state = a[0]
+            if kw:
+                for k, v in kw.items(): self[v] = k
+        def __getitem__(self, key):
+            return self.get(key, 0)
+        def __setitem__(self, key, value):
+            assert isinstance(key, type(0))
+            dictionary.__setitem__(self, key, value)
+        def setstate(self, state):
+            self.state = state
+        def getstate(self):
+            return self.state
+    verify(issubclass(C, dictionary))
+    a1 = C(12)
+    verify(a1.state == 12)
+    a2 = C(foo=1, bar=2)
+    verify(a2[1] == 'foo' and a2[2] == 'bar')
+    a = C()
+    verify(a.state == -1)
+    verify(a.getstate() == -1)
+    a.setstate(0)
+    verify(a.state == 0)
+    verify(a.getstate() == 0)
+    a.setstate(10)
+    verify(a.state == 10)
+    verify(a.getstate() == 10)
+    verify(a[42] == 0)
+    a[42] = 24
+    verify(a[42] == 24)
+    if verbose: print "pydict stress test ..."
+    N = 50
+    for i in range(N):
+        a[i] = C()
+        for j in range(N):
+            a[i][j] = i*j
+    for i in range(N):
+        for j in range(N):
+            verify(a[i][j] == i*j)
+
+def pylists():
+    if verbose: print "Testing Python subclass of list..."
+    class C(list):
+        def __getitem__(self, i):
+            return list.__getitem__(self, i) + 100
+        def __getslice__(self, i, j):
+            return (i, j)
+    a = C()
+    a.extend([0,1,2])
+    verify(a[0] == 100)
+    verify(a[1] == 101)
+    verify(a[2] == 102)
+    verify(a[100:200] == (100,200))
+
+def metaclass():
+    if verbose: print "Testing __metaclass__..."
+    global C
+    class C:
+        __metaclass__ = type
+        def __init__(self):
+            self.__state = 0
+        def getstate(self):
+            return self.__state
+        def setstate(self, state):
+            self.__state = state
+    a = C()
+    verify(a.getstate() == 0)
+    a.setstate(10)
+    verify(a.getstate() == 10)
+    class D:
+        class __metaclass__(type):
+            def myself(cls): return cls
+    verify(D.myself() == D)
+
+import sys
+MT = type(sys)
+
+def pymods():
+    if verbose: print "Testing Python subclass of module..."
+    global log
+    log = []
+    class MM(MT):
+        def __init__(self):
+            MT.__init__(self)
+        def __getattr__(self, name):
+            log.append(("getattr", name))
+            return MT.__getattr__(self, name)
+        def __setattr__(self, name, value):
+            log.append(("setattr", name, value))
+            MT.__setattr__(self, name, value)
+        def __delattr__(self, name):
+            log.append(("delattr", name))
+            MT.__delattr__(self, name)
+    a = MM()
+    a.foo = 12
+    x = a.foo
+    del a.foo
+    verify(log == [('getattr', '__init__'),
+                   ('getattr', '__setattr__'),
+                   ("setattr", "foo", 12),
+                   ("getattr", "foo"),
+                   ('getattr', '__delattr__'),
+                   ("delattr", "foo")], log)
+
+def multi():
+    if verbose: print "Testing multiple inheritance..."
+    global C
+    class C(object):
+        def __init__(self):
+            self.__state = 0
+        def getstate(self):
+            return self.__state
+        def setstate(self, state):
+            self.__state = state
+    a = C()
+    verify(a.getstate() == 0)
+    a.setstate(10)
+    verify(a.getstate() == 10)
+    class D(dictionary, C):
+        def __init__(self):
+            type({}).__init__(self)
+            C.__init__(self)
+    d = D()
+    verify(d.keys() == [])
+    d["hello"] = "world"
+    verify(d.items() == [("hello", "world")])
+    verify(d["hello"] == "world")
+    verify(d.getstate() == 0)
+    d.setstate(10)
+    verify(d.getstate() == 10)
+    verify(D.__mro__ == (D, dictionary, C, object))
+
+def diamond():
+    if verbose: print "Testing multiple inheritance special cases..."
+    class A(object):
+        def spam(self): return "A"
+    verify(A().spam() == "A")
+    class B(A):
+        def boo(self): return "B"
+        def spam(self): return "B"
+    verify(B().spam() == "B")
+    verify(B().boo() == "B")
+    class C(A):
+        def boo(self): return "C"
+    verify(C().spam() == "A")
+    verify(C().boo() == "C")
+    class D(B, C): pass
+    verify(D().spam() == "B")
+    verify(D().boo() == "B")
+    verify(D.__mro__ == (D, B, C, A, object))
+    class E(C, B): pass
+    verify(E().spam() == "B")
+    verify(E().boo() == "C")
+    verify(E.__mro__ == (E, C, B, A, object))
+    class F(D, E): pass
+    verify(F().spam() == "B")
+    verify(F().boo() == "B")
+    verify(F.__mro__ == (F, D, E, B, C, A, object))
+    class G(E, D): pass
+    verify(G().spam() == "B")
+    verify(G().boo() == "C")
+    verify(G.__mro__ == (G, E, D, C, B, A, object))
+
+def objects():
+    if verbose: print "Testing object class..."
+    a = object()
+    verify(a.__class__ == object == type(a))
+    b = object()
+    verify(a is not b)
+    verify(not hasattr(a, "foo"))
+    try:
+        a.foo = 12
+    except TypeError:
+        pass
+    else:
+        verify(0, "object() should not allow setting a foo attribute")
+    verify(not hasattr(object(), "__dict__"))
+
+    class Cdict(object):
+        pass
+    x = Cdict()
+    verify(x.__dict__ is None)
+    x.foo = 1
+    verify(x.foo == 1)
+    verify(x.__dict__ == {'foo': 1})
+
+def slots():
+    if verbose: print "Testing __slots__..."
+    class C0(object):
+        __slots__ = []
+    x = C0()
+    verify(not hasattr(x, "__dict__"))
+    verify(not hasattr(x, "foo"))
+
+    class C1(object):
+        __slots__ = ['a']
+    x = C1()
+    verify(not hasattr(x, "__dict__"))
+    verify(x.a == None)
+    x.a = 1
+    verify(x.a == 1)
+    del x.a
+    verify(x.a == None)
+
+    class C3(object):
+        __slots__ = ['a', 'b', 'c']
+    x = C3()
+    verify(not hasattr(x, "__dict__"))
+    verify(x.a is None)
+    verify(x.b is None)
+    verify(x.c is None)
+    x.a = 1
+    x.b = 2
+    x.c = 3
+    verify(x.a == 1)
+    verify(x.b == 2)
+    verify(x.c == 3)
+
+def dynamics():
+    if verbose: print "Testing __dynamic__..."
+    verify(object.__dynamic__ == 0)
+    verify(list.__dynamic__ == 0)
+    class S1:
+        __metaclass__ = type
+    verify(S1.__dynamic__ == 0)
+    class S(object):
+        pass
+    verify(C.__dynamic__ == 0)
+    class D(object):
+        __dynamic__ = 1
+    verify(D.__dynamic__ == 1)
+    class E(D, S):
+        pass
+    verify(E.__dynamic__ == 1)
+    class F(S, D):
+        pass
+    verify(F.__dynamic__ == 1)
+    try:
+        S.foo = 1
+    except (AttributeError, TypeError):
+        pass
+    else:
+        verify(0, "assignment to a static class attribute should be illegal")
+    D.foo = 1
+    verify(D.foo == 1)
+    # Test that dynamic attributes are inherited
+    verify(E.foo == 1)
+    verify(F.foo == 1)
+    class SS(D):
+        __dynamic__ = 0
+    verify(SS.__dynamic__ == 0)
+    verify(SS.foo == 1)
+    try:
+        SS.foo = 1
+    except (AttributeError, TypeError):
+        pass
+    else:
+        verify(0, "assignment to SS.foo should be illegal")
+
+def errors():
+    if verbose: print "Testing errors..."
+
+    try:
+        class C(list, dictionary):
+            pass
+    except TypeError:
+        pass
+    else:
+        verify(0, "inheritance from both list and dict should be illegal")
+
+    try:
+        class C(object, None):
+            pass
+    except TypeError:
+        pass
+    else:
+        verify(0, "inheritance from non-type should be illegal")
+    class Classic:
+        pass
+
+    try:
+        class C(object, Classic):
+            pass
+    except TypeError:
+        pass
+    else:
+        verify(0, "inheritance from object and Classic should be illegal")
+
+    try:
+        class C(int):
+            pass
+    except TypeError:
+        pass
+    else:
+        verify(0, "inheritance from int should be illegal")
+
+    try:
+        class C(object):
+            __slots__ = 1
+    except TypeError:
+        pass
+    else:
+        verify(0, "__slots__ = 1 should be illegal")
+
+    try:
+        class C(object):
+            __slots__ = [1]
+    except TypeError:
+        pass
+    else:
+        verify(0, "__slots__ = [1] should be illegal")
+
+def classmethods():
+    if verbose: print "Testing class methods..."
+    class C(object):
+        def foo(*a): return a
+        goo = classmethod(foo)
+    c = C()
+    verify(C.goo(1) == (C, 1))
+    verify(c.goo(1) == (C, 1))
+    verify(c.foo(1) == (c, 1))
+    class D(C):
+        pass
+    d = D()
+    verify(D.goo(1) == (D, 1))
+    verify(d.goo(1) == (D, 1))
+    verify(d.foo(1) == (d, 1))
+    verify(D.foo(d, 1) == (d, 1))
+
+def staticmethods():
+    if verbose: print "Testing static methods..."
+    class C(object):
+        def foo(*a): return a
+        goo = staticmethod(foo)
+    c = C()
+    verify(C.goo(1) == (1,))
+    verify(c.goo(1) == (1,))
+    verify(c.foo(1) == (c, 1,))
+    class D(C):
+        pass
+    d = D()
+    verify(D.goo(1) == (1,))
+    verify(d.goo(1) == (1,))
+    verify(d.foo(1) == (d, 1))
+    verify(D.foo(d, 1) == (d, 1))
+
+def classic():
+    if verbose: print "Testing classic classes..."
+    class C:
+        def foo(*a): return a
+        goo = classmethod(foo)
+    c = C()
+    verify(C.goo(1) == (C, 1))
+    verify(c.goo(1) == (C, 1))
+    verify(c.foo(1) == (c, 1))
+    class D(C):
+        pass
+    d = D()
+    verify(D.goo(1) == (D, 1))
+    verify(d.goo(1) == (D, 1))
+    verify(d.foo(1) == (d, 1))
+    verify(D.foo(d, 1) == (d, 1))
+
+def compattr():
+    if verbose: print "Testing computed attributes..."
+    class C(object):
+        class computed_attribute(object):
+            def __init__(self, get, set=None):
+                self.__get = get
+                self.__set = set
+            def __get__(self, obj, type=None):
+                return self.__get(obj)
+            def __set__(self, obj, value):
+                return self.__set(obj, value)
+        def __init__(self):
+            self.__x = 0
+        def __get_x(self):
+            x = self.__x
+            self.__x = x+1
+            return x
+        def __set_x(self, x):
+            self.__x = x
+        x = computed_attribute(__get_x, __set_x)
+    a = C()
+    verify(a.x == 0)
+    verify(a.x == 1)
+    a.x = 10
+    verify(a.x == 10)
+    verify(a.x == 11)
+
+def newslot():
+    if verbose: print "Testing __new__ slot override..."
+    class C(list):
+        def __new__(cls):
+            self = list.__new__(cls)
+            self.foo = 1
+            return self
+        def __init__(self):
+            self.foo = self.foo + 2
+    a = C()
+    verify(a.foo == 3)
+    verify(a.__class__ is C)
+    class D(C):
+        pass
+    b = D()
+    verify(b.foo == 3)
+    verify(b.__class__ is D)
+
+class PerverseMetaType(type):
+    def mro(cls):
+        L = type.mro(cls)
+        L.reverse()
+        return L
+
+def altmro():
+    if verbose: print "Testing mro() and overriding it..."
+    class A(object):
+        def f(self): return "A"
+    class B(A):
+        pass
+    class C(A):
+        def f(self): return "C"
+    class D(B, C):
+        pass
+    verify(D.mro() == [D, B, C, A, object] == list(D.__mro__))
+    verify(D().f() == "C")
+    class X(A,B,C,D):
+        __metaclass__ = PerverseMetaType
+    verify(X.__mro__ == (object, A, C, B, D, X))
+    verify(X().f() == "A")
+
+def overloading():
+    if verbose: print "testing operator overloading..."
+
+    class B(object):
+        "Intermediate class because object doesn't have a __setattr__"
+
+    class C(B):
+
+        def __getattr__(self, name):
+            if name == "foo":
+                return ("getattr", name)
+            else:
+                return B.__getattr__(self, name)
+        def __setattr__(self, name, value):
+            if name == "foo":
+                self.setattr = (name, value)
+            else:
+                return B.__setattr__(self, name, value)
+        def __delattr__(self, name):
+            if name == "foo":
+                self.delattr = name
+            else:
+                return B.__delattr__(self, name)
+
+        def __getitem__(self, key):
+            return ("getitem", key)
+        def __setitem__(self, key, value):
+            self.setitem = (key, value)
+        def __delitem__(self, key):
+            self.delitem = key
+
+        def __getslice__(self, i, j):
+            return ("getslice", i, j)
+        def __setslice__(self, i, j, value):
+            self.setslice = (i, j, value)
+        def __delslice__(self, i, j):
+            self.delslice = (i, j)
+
+    a = C()
+    verify(a.foo == ("getattr", "foo"))
+    a.foo = 12
+    verify(a.setattr == ("foo", 12))
+    del a.foo
+    verify(a.delattr == "foo")
+
+    verify(a[12] == ("getitem", 12))
+    a[12] = 21
+    verify(a.setitem == (12, 21))
+    del a[12]
+    verify(a.delitem == 12)
+
+    verify(a[0:10] == ("getslice", 0, 10))
+    a[0:10] = "foo"
+    verify(a.setslice == (0, 10, "foo"))
+    del a[0:10]
+    verify(a.delslice == (0, 10))
+
+def all():
+    lists()
+    dicts()
+    ints()
+    longs()
+    floats()
+    complexes()
+    spamlists()
+    spamdicts()
+    pydicts()
+    pylists()
+    metaclass()
+    pymods()
+    multi()
+    diamond()
+    objects()
+    slots()
+    dynamics()
+    errors()
+    classmethods()
+    staticmethods()
+    classic()
+    compattr()
+    newslot()
+    altmro()
+    overloading()
+
+all()
+
+if verbose: print "All OK"
diff --git a/Lib/test/test_generators.py b/Lib/test/test_generators.py
index 2a174c3..72a70ec 100644
--- a/Lib/test/test_generators.py
+++ b/Lib/test/test_generators.py
@@ -380,10 +380,16 @@
 >>> i = g()
 >>> type(i)
 <type 'generator'>
+
+XXX dir(object) *generally* doesn't return useful stuff in descr-branch.
 >>> dir(i)
+[]
+
+Was hoping to see this instead:
 ['gi_frame', 'gi_running', 'next']
+
 >>> print i.next.__doc__
-next() -- get the next value, or raise StopIteration
+x.next() -> the next value, or raise StopIteration
 >>> iter(i) is i
 1
 >>> import types
@@ -399,7 +405,7 @@
 >>> i.gi_running = 42
 Traceback (most recent call last):
   ...
-TypeError: object has read-only attributes
+TypeError: 'generator' object has only read-only attributes (assign to .gi_running)
 >>> def g():
 ...     yield me.gi_running
 >>> me = g()